Dropsketch is a free drawing app that you can use to leave sketches at the places you visit for others to see. It's really simple to use, just download the app from the iTunes App Store and use the drawing tools provided to sketch whatever comes to mind and then press the 'share' button to share it. Please note, while inappropriate use is discouraged, some offensive images may be displayed.

By using Dropsketch you agree not to share any sketches that could be seen as racist, sexist or offensive in other ways. Any such sketches will be removed and may result in your mobile device from being banned from using the Dropsketch sharing facility. You should also avoid sharing sketches that identify yourself, or others, or contain personal information. Again, these are likely to be removed. Once shared, your sketches will be considered to have entered the public domain.